A communication device (1) according to the present disclosure includes: a frame receiving part (11) which receives a frame; a determining part (12) which determines a user identifier and a priority traffic class; a plurality of queues (13) which each hold frames for each user identifier and priority traffic class; a list storage part (15) which stores a gate control list indicating times of a plurality of time slots and open/closed states which are either open states or closed states of a plurality of gates (14), a gate opening/closing part (17) which controls open/closed states of the plurality of gates; and a frame transmitting part (18) which transmits frames held in a queue (13-k) corresponding to a gate (14-k) controlled to be in an open state, in which at least one time slot in the gate control list is a delay guarantee period.